On August 28, Tencent Hunyuan unveiled and open-sourced its latest iteration of a large language model, the Hy4 preview. This cutting-edge model is notable for its staggering 770 billion parameters, with 49 billion of them being actively utilized, and it supports a context length that surpasses 1 million. Currently, the Hy4 preview has been made available across various Tencent platforms, including both domestic and international versions of WorkBuddy/CodeBuddy, Yuanbao, and ima. Users have the convenience of directly interacting with the model or accessing its API via Tencent Cloud Tokenhub and OpenRouter. Regarding pricing, it is set at 6 yuan per million tokens for input, 18 yuan per million tokens for output, and a mere 0.3 yuan per million tokens for cache hits, offering a cost-effective solution for users.